Name ______________________________________________ Date _____________ Pd. ____ # _______
Transcription / Translation Practice
Questions:
1. a. What is the purpose of transcription?
b. Where does transcription occur?
c. What is the purpose of translation?
d. Where does translation occur?
2. What are proteins made of?
3. DNA REPLICATION: Replicate the following DNA strand. Imagine the DNA has unzipped.
----------------------------------------------------------------------------------------------------------------------------- --------------Original: T A C
T A G
C C G
C G A
T T T
A C A
A T T
New Strand: A T G
T A A .
A T C
G G C
G C T
A A A
T G T
Use the codon chart to complete the following:
4. TRANSCRIPTION AND TRANSLATION:
Write the base sequence for the mRNA strand and the amino acid that it codes for.
DNA sequence:
T A C
T A G
C C G
C G A
T T T
Codons on the mRNA:
(Transcription)
A U G
A U C
G G C
G C U
A A A
Amino acid sequence:
(Translation)
Met (start codon)
Ile
Gly
Ala
DNA:
T A C
T A G
C C G
C G A
T T T
A C A
A T T
mRNA: A U G
A U C
G G C
G C T
A A A
U G U
U A A
AAs:
Met(start)
Ile
Gly
Cys
stop
DNA:
T A C
G C C
T T A
Ala
A A G
Lys
G G C
Lys
C G A
A T C
mRNA: A U G
C G G
A A U
AAs:
Met(start)
Arg
Asn
DNA:
T A C
A A A
T C A
C C A
mRNA: A U G
U U U
A G U
G G U
AAs:
Met(start)
Phe
DNA:
T A C
C C C
T G C
G T G
G G G
T G A
G T T
mRNA: A U G
G G G
A C G
C A C
C
A C U
C A A
AAs:
Gly
His
Pro
Met(start)
Ser
Thr
U U C
Phe
Gly
C C G
G C U
U A G
Pro
Ala
stop
A T G
A T T
C U G
U A C
U A A
Leu
Tyr
stop
G A C
C
C
Thr
Gin